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node_modules/tar/lib/normalize-unicode.js

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+// warning: extremely hot code path.
+// This has been meticulously optimized for use
+// within npm install on large package trees.
+// Do not edit without careful benchmarking.
+const normalizeCache = Object.create(null)
+const { hasOwnProperty } = Object.prototype
+module.exports = s => {
+  if (!hasOwnProperty.call(normalizeCache, s)) {
+    normalizeCache[s] = s.normalize('NFD')
+  }
+  return normalizeCache[s]
+}